Bug 1023662 - [User story] Show 5 day week view r=gaye

**WIP**, still going to clean up the code and try to use external templates for most of the elements.. I have a few more changes locally (trying to abstract it better so that we can use same logic for day view as well), but will probably take another full day to clean up the code..

I'll rebase this later and squash commits.
if we do it, I think we should do everything at once.. to be honest I think it's too late for that.. it will suck to have commits that only changes white spaces affecting `git blame`. It doesn't really matter how things are indented, as long as we keep it consistent.